APT User Agent
Detects suspicious user agent strings used in APT malware in proxy logs
Generic test proxy - - - highFlorian Roth (Nextron Systems), Markus Neis 2019-11-12 2024-02-15 6ec820f2-e963-4801-9127-d8b2dce4d31b
1 APT40 Dropbox Tool User Agent
Detects suspicious user agent string of APT40 Dropbox tool
Emerging test proxy - - - highThomas Patzke 2019-11-12 2023-05-18 5ba715b6-71b7-44fd-8245-f66893e81b3d
1 Axios NPM Compromise Malicious C2 Domain DNS Query
Detects DNS queries for the malicious C2 domain associated with the plain-crypto-js/Axios npm package supply chain compromise. (...)
Emerging experimental dns - - - highSwachchhanda Shrawan Poudel (Nextron Systems) 2026-04-01 — 73e5d24f-493f-4092-bd2f-c72cabda40ee
6 Base64 Encoded PowerShell Command Detected
Detects usage of the "FromBase64String" function in the commandline which is used to decode a base64 (...)
Generic test process_creation windows Sysmon · WinEventLog Security - highFlorian Roth (Nextron Systems) 2020-01-29 2023-01-26 e32d4572-9826-4738-b651-95fa63747e8a
1 Bitbucket User Details Export Attempt Detected
Detects user data export activity.
Generic test cloud_audit - Bitbucket Audit · Bitbucket - mediumMuhammad Faisal (@faisalusuf) 2024-02-25 — 5259cbf2-0a75-48bf-b57a-c54d6fabaef3
2 Bitbucket User Permissions Export Attempt
Detects user permission data export attempt.
Generic test cloud_audit - Bitbucket Audit · Bitbucket - mediumMuhammad Faisal (@faisalusuf) 2024-02-25 — 87cc6698-3e07-4ba2-9b43-a85a73e151e2
2 Bitsadmin to Uncommon IP Server Address
Detects Bitsadmin connections to IP addresses instead of FQDN names
Generic test proxy - - - highFlorian Roth (Nextron Systems) 2022-06-10 2022-08-24 8ccd35a2-1c7c-468b-b568-ac6cdf80eec3
1 Bitsadmin to Uncommon TLD
Detects Bitsadmin connections to domains with uncommon TLDs
Generic test proxy - - - highFlorian Roth (Nextron Systems), Tim Shelton 2019-03-07 2026-09-30 9eb68894-7476-4cd6-8752-23b51f5883a7
2 Certificate Exported Via Certutil.EXE
Detects the execution of the certutil with the "exportPFX" flag which allows the utility to export certificates.
Generic test process_creation windows Sysmon · WinEventLog Security - mediumFlorian Roth (Nextron Systems), Jonhnathan Ribeiro, oscd.community, Nasreddine Bencherchali (Nextron Systems) 2023-02-15 2024-03-05 3ffd6f51-e6c1-47b7-94b4-c1e61d4117c5
1 Splunk
CertUtil With Decode Argument
The following analytic detects the use of CertUtil.exe with the 'decode' argument, which may indicate an attempt to decode a previously encoded file, potentially containing malicious payloads. (...)
Generic stable process_creation windows Sysmon · WinEventLog Security · CrowdStrike - mediumMichael Haag, Splunk 2021-03-25 2026-10-02 bfe94226-8c10-11eb-a4b3-acde48001122
5 Chafer Malware URL Pattern
Detects HTTP request used by Chafer malware to receive data from its C2.
Emerging test proxy - - - highFlorian Roth (Nextron Systems) 2019-01-31 2024-02-15 fb502828-2db0-438e-93e6-801c7548686d
1 Change User Agents with WebRequest
Adversaries may communicate using application layer protocols associated with web traffic to avoid detection/network filtering by blending in with existing traffic. (...)
Generic test ps_script windows PowerShell - mediumfrack113 2022-01-23 2025-07-18 d4488827-73af-4f8d-9244-7b7662ef046e
1 Splunk
Cisco ASA - Reconnaissance Command Activity
This analytic detects potential reconnaissance activities on Cisco ASA devices by identifying execution of multiple information-gathering "show" commands within a short timeframe. (...)
Anomaly stable firewall - Cisco Secure Firewall · Cisco - mediumNasreddine Bencherchali, Splunk 2025-11-21 2026-05-13 6e9d4f7a-3c8b-4a9e-8d2f-7b5c9e1a6f3d
1 Cisco Discovery
Find information about network devices that is not stored in config files
Generic test authentication - Cisco AAA · Cisco - lowAustin Clark 2019-08-12 2023-01-04 9705a6a1-6db6-4a16-a987-15b7151e299b
1 Splunk
Cisco IOS XE Reconnaissance Command Activity
This analytic detects bursts of Cisco IOS or NX-OS discovery commands associated with Salt Typhoon tradecraft. (...)
Anomaly stable network_device - Cisco IOS · Cisco - mediumNasreddine Bencherchali 2026-05-19 2026-05-20 71ac5328-2364-40cf-8381-92b8dc531399
2 Splunk
Cisco NVM - Osascript Network Connection for a Long Duration
This analytic detects the usage of the Utility osascript on a macOS device initiated a network connection lasting longer than 10 minutes (600 seconds). (...)
Anomaly stable network_connection - Cisco NVM · Cisco - mediumRadka Viskova, Splunk 2026-09-18 2026-09-22 6bc88a9d-f7de-4257-b526-acf15bc5a517
5 Splunk
Cisco Secure Firewall - Blacklisted SSL Certificate Fingerprint
The following analytic detects the use of known suspicious SSL certificates in any observed event where the SSL_CertFingerprint field is present. (...)
Generic stable firewall - Cisco Secure Firewall · Cisco - mediumNasreddine Bencherchali, Splunk 2025-04-03 2026-09-22 c43f7b49-2dab-4e76-892e-7f971c2f20f1
1 Splunk
Cisco Secure Firewall - Connection to File Sharing Domain
The following analytic detects outbound connections to commonly abused file sharing and pastebin-style hosting domains. (...)
Anomaly stable firewall - Cisco Secure Firewall · Cisco - mediumNasreddine Bencherchali, Splunk 2025-04-03 2026-05-13 f7e5e792-d907-46c1-a58e-4ff974dc462a
1 Splunk
Cisco Secure Firewall - High EVE Threat Confidence
The following analytic detects connections with a high Encrypted Visibility Engine (EVE) threat confidence score, indicating potentially malicious behavior within encrypted traffic. (...)
Anomaly stable firewall - Cisco Secure Firewall · Cisco - mediumNasreddine Bencherchali, Splunk 2025-04-03 2026-05-13 8c15183e-2e70-4db4-86c3-88f8d9129b66
1 Splunk
Cisco Secure Firewall - Lumma Stealer Activity
This analytic detects Lumma Stealer activity using Cisco Secure Firewall Intrusion Events. (...)
Generic stable firewall - Cisco Secure Firewall · Cisco - mediumNasreddine Bencherchali, Splunk, Talos NTDR 2025-04-16 2026-05-13 96bce783-c22e-4e48-8cf1-3eb2794c5083
1 Splunk
Cisco Secure Firewall - Repeated Malware Downloads
The following analytic detects repeated malware file downloads initiated by the same internal host (src) within a short time window. (...)
Anomaly stable firewall - Cisco Secure Firewall · Cisco - mediumNasreddine Bencherchali, Splunk 2025-04-09 2026-09-22 aeff2bb5-3483-48d4-9be8-c8976194be1e
1 Splunk
Cisco Secure Firewall - Snort Rule Triggered Across Multiple Hosts
This analytic identifies Snort intrusion signatures that have been triggered by ten or more distinct internal IP addresses within a one-hour window. (...)
Anomaly stable firewall - Cisco Secure Firewall · Cisco - mediumNasreddine Bencherchali, Splunk 2025-04-16 2026-05-13 a4c76d0a-56b6-44be-814b-939746c4d406
1 Splunk
Cisco Secure Firewall - Wget or Curl Download
The following analytic detects outbound connections initiated by command-line tools such as curl or wget. (...)
Anomaly stable firewall - Cisco Secure Firewall · Cisco - mediumNasreddine Bencherchali, Splunk 2025-04-03 2026-05-13 173a1cb9-1814-4128-a9dc-f29dade89957
1 Classes Autorun Keys Modification
Detects modification of Windows Registry Classes keys used for persistence. (...)
Generic test registry_set windows Sysmon · WinEventLog Security - mediumVictor Sergeev, Daniil Yugoslavskiy, Gleb Sukhodolskiy, Timur Zinniatullin, oscd.community, Tim Shelton, frack113 (split) 2019-10-25 2025-10-22 9df5f547-c86a-433e-b533-f2794357e242
3 Cloudflared Tunnels Related DNS Requests
Detects DNS requests to Cloudflared tunnels domains. (...)
Generic test dns windows Sysmon - mediumNasreddine Bencherchali (Nextron Systems) 2023-12-20 — a1d9eec5-33b2-4177-8d24-27fe754d0812
2 CMD Shell Output Redirect
Detects the use of the redirection character ">" to redirect information on the command line. (...)
Hunting test process_creation windows Sysmon · WinEventLog Security - lowfrack113 2022-01-22 2024-03-19 4f4eaa9f-5ad4-410c-a4be-bc6132b0175a
1 Common Autorun Keys Modification
Detects modification of autostart extensibility point (ASEP) in registry.
Generic test registry_set windows Sysmon · WinEventLog Security - mediumVictor Sergeev, Daniil Yugoslavskiy, Gleb Sukhodolskiy, Timur Zinniatullin, oscd.community, Tim Shelton, frack113 (split), wagga (name) 2019-10-25 2025-10-22 f59c3faf-50f3-464b-9f4c-1b67ab512d99
4 ComRAT Network Communication
Detects Turla ComRAT network communication.
Emerging test proxy - - - highFlorian Roth (Nextron Systems) 2020-05-26 2024-02-26 7857f021-007f-4928-8b2c-7aedbe64bb82
1 Container Residence Discovery Via Proc Virtual FS
Detects potential container discovery via listing of certain kernel features in the "/proc" virtual (...)
Generic test process_creation linux Sysmon - lowSeth Hanford 2023-08-23 — 746c86fb-ccda-4816-8997-01386263acc4
2 ConvertTo-SecureString Cmdlet Usage Via CommandLine
Detects usage of the "ConvertTo-SecureString" cmdlet via the commandline. (...)
Generic test process_creation windows Sysmon · WinEventLog Security - mediumTeymur Kheirkhabarov (idea), Vasiliy Burov (rule), oscd.community, Tim Shelton 2020-10-11 2023-02-01 74403157-20f5-415d-89a7-c505779585cf
2 Crypto Miner User Agent
Detects suspicious user agent strings used by crypto miners in proxy logs
Generic test proxy - - - highFlorian Roth (Nextron Systems) 2019-10-21 2021-11-27 fa935401-513b-467b-81f4-f9e77aa0dd78
2 Splunk
Curl Execution with Percent Encoded URL
The following analytic detects the execution of the curl utility where the command line includes percent-encoded characters and explicit file output options (such as -o or --output). (...)
Anomaly stable process_creation windows · linux CrowdStrike · Sysmon · WinEventLog Security - mediumNasreddine Bencherchali, Splunk 2026-03-03 2026-05-13 9a8d5516-4c5e-11ef-9d42-acde48001122
4 Curl.EXE Execution With Custom UserAgent
Detects execution of curl.exe with custom useragent options
Hunting test process_creation windows Sysmon · WinEventLog Security - mediumfrack113 2022-01-23 2023-02-21 3286d37a-00fd-41c2-a624-a672dcd34e60
2 CurrentControlSet Autorun Keys Modification
Detects modification of autostart extensibility point (ASEP) in registry.
Generic test registry_set windows Sysmon · WinEventLog Security - mediumVictor Sergeev, Daniil Yugoslavskiy, Gleb Sukhodolskiy, Timur Zinniatullin, oscd.community, Tim Shelton, frack113 (split) 2019-10-25 2023-08-17 f674e36a-4b91-431e-8aef-f8a96c2aca35
3 CurrentVersion Autorun Keys Modification
Detects modification of autostart extensibility point (ASEP) in registry.
Generic test registry_set windows Sysmon · WinEventLog Security - mediumVictor Sergeev, Daniil Yugoslavskiy, Gleb Sukhodolskiy, Timur Zinniatullin, oscd.community, Tim Shelton, frack113 (split) 2019-10-25 2025-10-22 20f0ee37-5942-4e45-b7d5-c5b5db9df5cd
4 CurrentVersion NT Autorun Keys Modification
Detects modification of autostart extensibility point (ASEP) in registry.
Generic test registry_set windows Sysmon · WinEventLog Security - mediumVictor Sergeev, Daniil Yugoslavskiy, Gleb Sukhodolskiy, Timur Zinniatullin, oscd.community, Tim Shelton, frack113 (split) 2019-10-25 2025-10-22 cbf93e5d-ca6c-4722-8bea-e9119007c248
3 Decode Base64 Encoded Text
Detects usage of base64 utility to decode arbitrary base64-encoded text
Generic test process_creation linux Sysmon - lowDaniil Yugoslavskiy, oscd.community 2020-10-19 2021-11-27 e2072cab-8c9a-459b-b63c-40ae79e27031
1 Decode Base64 Encoded Text -MacOs
Detects usage of base64 utility to decode arbitrary base64-encoded text
Generic test process_creation macos - - lowDaniil Yugoslavskiy, oscd.community 2020-10-19 2022-11-26 719c22d7-c11a-4f2c-93a6-2cfdd5412f68
1 Splunk
Detect attackers scanning for vulnerable JBoss servers
The following analytic identifies specific GET or HEAD requests to web servers that indicate reconnaissance attempts to find vulnerable JBoss servers. (...)
Generic experimental webserver - - - mediumBhavin Patel, Splunk 2020-04-29 2026-05-13 104658f4-afdc-499e-9719-17243f982681
- Direct Autorun Keys Modification
Detects direct modification of autostart extensibility point (ASEP) in registry using reg.exe.
Generic test process_creation windows Sysmon · WinEventLog Security - mediumVictor Sergeev, Daniil Yugoslavskiy, oscd.community, Swachchhanda Shrawan Poudel (Nextron Systems) 2019-10-25 2026-01-05 24357373-078f-44ed-9ac4-6d334a668a11
2 DNS Query Request By QuickAssist.EXE
Detects DNS queries initiated by "QuickAssist.exe" to Microsoft Quick Assist primary endpoint that is used to establish a session.
Generic experimental dns windows Sysmon - lowMuhammad Faisal (@faisalusuf) 2024-12-19 — 882e858a-3233-4ba8-855e-2f3d3575803d
4 DNS Query To Devtunnels Domain
Detects DNS query requests to Devtunnels domains. (...)
Generic test dns windows Sysmon - mediumcitron_ninja 2023-10-25 2023-11-20 1cb0c6ce-3d00-44fc-ab9c-6d6d577bf20b
3 DNS Query To Visual Studio Code Tunnels Domain
Detects DNS query requests to Visual Studio Code tunnel domains. (...)
Generic test dns windows Sysmon - mediumcitron_ninja 2023-10-25 2023-11-20 b3e6418f-7c7a-4fad-993a-93b65027a9f1
3 DNS-over-HTTPS Enabled by Registry
Detects when a user enables DNS-over-HTTPS. (...)
Generic test registry_set windows Sysmon · WinEventLog Security - mediumAustin Songer 2021-07-22 2023-08-17 04b45a8a-d11d-49e4-9acc-4a1b524407a5
4 Docker Container Discovery Via Dockerenv Listing
Detects listing or file reading of ".dockerenv" which can be a sing of potential container discovery
Generic test process_creation linux Sysmon - lowSeth Hanford 2023-08-23 — 11701de9-d5a5-44aa-8238-84252f131895
2 Domain User Enumeration Network Recon 01
Domain user and group enumeration via network reconnaissance. (...)
Unsupported unsupported - - DCE/RPC · Zeek - mediumNate Guagenti (@neu5ron), Open Threat Research (OTR) 2020-05-03 2023-03-24 66a0bdc6-ee04-441a-9125-99d2eb547942
2 Splunk
ESXi System Information Discovery
This detection identifies the use of ESXCLI system-level commands that retrieve configuration details. (...)
Generic stable - esxi VMware ESXi · VMware - mediumRaven Tait, Splunk 2025-07-11 2026-05-13 b4d4217a-6673-4fb6-837d-07a522bdf9f7
- Exploit Framework User Agent
Detects suspicious user agent strings used by exploit / pentest frameworks like Metasploit in proxy (...)
Generic test proxy - - - highFlorian Roth (Nextron Systems) 2017-07-08 2025-01-18 fdd1bfb5-f60b-4a35-910e-f36ed3d0b32f
1 File Creation In Suspicious Directory By Msdt.EXE
Detects msdt.exe creating files in suspicious directories which could be a sign of exploitation of e (...)
Generic test file_event windows Sysmon highVadim Varganov, Florian Roth (Nextron Systems) 2022-08-24 2023-02-23 318557a5-150c-4c8d-b70e-a9910e199857
2 File Decoded From Base64/Hex Via Certutil.EXE
Detects the execution of certutil with either the "decode" or "decodehex" flags to decode base64 or hex encoded files. (...)
Generic test process_creation windows Sysmon · WinEventLog Security - highFlorian Roth (Nextron Systems), Jonhnathan Ribeiro, oscd.community 2023-02-15 2025-06-04 cc9cbe82-7bc0-4ef5-bc23-bbfb83947be7
6